Infinite Loop

FRRouting is vulnerable to Infinite Loop. The vulnerability is due to a Loop with Unreachable Exit Condition in FRRouting when parsing certain babeld unicast hello messages that are intended to be ignored. An attacker can exploit this by sending specially crafted hello messages with the unicast flag set, the interval field set to 0, or any TLV that contains a sub-TLV with the Mandatory flag set, causing an infinite loop and resulting in a denial of service.